package com.xingyue.loginqueryarticle.filers;
/*
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
*/
/**
 * Created by Administrator on 2016/11/18 0018.
 */
/*
@WebFilter(urlPatterns = "/main.jsp")
public class LoginFilters implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse)servletResponse;
        HttpSession session = request.getSession(false);

        if(session != null && session.getAttribute("user") != null){//登录了,放行给下一个资源
            System.out.println("放行了....................");
            filterChain.doFilter(request,response);
        }else{
            System.out.println("拦截了....................");
            //跳转到登录界面
            response.sendRedirect("login.jsp");
        }
    }

    @Override
    public void destroy() {
    }

}
*/